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As low-cost RFIDs become more and more popular, it is imperative to design ultra-lightweight RFID authentication protocols to resist all possible attacks and threats. However, all the previous ultra-lightweight authentication schemes are vulnerable to various attacks. In this paper, we propose a new ultra-lightweight RFID authentication protocol that provides strong authentication and strong integrity protection of its transmission and of updated data. The protocol requires only simple bit-wise operations on the tag and can resist all the possible attacks. These features make it very attractive to low-cost RFIDs and very low-cost RFIDs.
Security and Privacy Protection, Authentication, Cryptographic controls, Access controls

H. Chien, "SASI: A New Ultralightweight RFID Authentication Protocol Providing Strong Authentication and Strong Integrity," in IEEE Transactions on Dependable and Secure Computing, vol. 4, no. , pp. 337-340, 2007.
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